Hearing aid battery charging base



FIG. 1 is a front perspective view of a hearing aid battery charging base, showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is a front perspective view of a second embodiment of the hearing aid battery charging base;

FIG. 9 is a front view thereof;

FIG. 10 is a rear view thereof;

FIG. 11 is a left side view thereof;

FIG. 12 is a right side view thereof;

FIG. 13 is a top plan view thereof; and,

FIG. 14 is a bottom plan view thereof.

The dashed lines in the drawing views depict portions of the design that form no part of the claim. 

CLAIM We claim the ornamental design for a hearing aid battery charging base, as shown and described. 